Home / 131,528.16-181,519.98-80,540.64

Finding the Fourth Proportional to 131,528.16, 181,519.98 and 80,540.64

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Solution

The fourth proportional to 131,528.16, 181,519.98 and 80,540.64 is: 111,152.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,528.16 : 181,519.98 = 80,540.64 : x
  2. Step 2: Convert to fraction form
    131,528.16/181,519.98 = 80,540.64/x
  3. Step 3: Cross multiply
    131,528.16x = 181,519.98 × 80,540.64
  4. Step 4: Simplify right side
    131,528.16x = 14,619,735,361.99
  5. Step 5: Solve for x
    x = 14,619,735,361.99/131,528.16
  6. Step 6: Final answer
    x = 111,152.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.